SE528004C2 - Device for optical remote listening and systems including such device - Google Patents
Device for optical remote listening and systems including such deviceInfo
- Publication number
- SE528004C2 SE528004C2 SE0403074A SE0403074A SE528004C2 SE 528004 C2 SE528004 C2 SE 528004C2 SE 0403074 A SE0403074 A SE 0403074A SE 0403074 A SE0403074 A SE 0403074A SE 528004 C2 SE528004 C2 SE 528004C2
- Authority
- SE
- Sweden
- Prior art keywords
- membrane
- eye
- cat
- sides
- light
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 26
- 241000282326 Felis catus Species 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000004891 communication Methods 0.000 description 2
- 208000010201 Exanthema Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 201000005884 exanthem Diseases 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
- G02B5/122—Reflex reflectors cube corner, trihedral or triple reflector type
- G02B5/124—Reflex reflectors cube corner, trihedral or triple reflector type plural reflecting elements forming part of a unitary plate or sheet
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/12—Reflex reflectors
- G02B5/122—Reflex reflectors cube corner, trihedral or triple reflector type
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/008—Transducers other than those covered by groups H04R9/00 - H04R21/00 using optical signals for detecting or generating sound
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Emergency Alarm Devices (AREA)
- Optical Communication System (AREA)
Abstract
Description
25 30 35 528 004 2 Fig. 6 visar retroreflektor i form av kattöga. 25 30 35 528 004 2 Fig. 6 shows the retrore ector in the form of a cat's eye.
Fig. 7 visar retroreflektor i form av kattöga.Fig. 7 shows the retrore ector in the form of a cat's eye.
Figurema 1-2 och 6-7 visar anordning (1) för optisk fjärravlyssning enligt olika utföringsexempel. Anordningen (1) innefattar en retroreflektor (3,4) samt ett akustiskt membran (2). En retroreflektor är en anordning som reflekterar infallande ljus tillbaka mot det infallande ljusets källa. Det akustiska membranet (2) är ljusmodulerande och modulerar reflektlonen av en infallande ljusstrále (6) i förhållande till det tryckfält (5) som membranet (2) utsätts för. l figur 1-2 visas anordningen (1) med en retroreflektor innefattande en hörnkub (3) med tre sidor (31,32,33; 31 '32'33'). l figur 1 är membranet (2) anordnat pá en av sidorna (31) och utgör en del av denna sida (31). I figur 2 täcker membranet (2) hela sidan (31 '), sidan (31') består av sagda membran (2).Figures 1-2 and 6-7 show device (1) for optical remote listening according to different embodiments. The device (1) comprises a retrore ector (3,4) and an acoustic diaphragm (2). A retrore ector is a device that re-reflects incident light back to the source of the incident light. The acoustic membrane (2) is light-modulating and modulates the response of an incident light beam (6) in relation to the pressure field (5) to which the membrane (2) is exposed. Figures 1-2 show the device (1) with a retroreector comprising a corner cube (3) with three sides (31,32,33; 31 '32'33'). In layer 1, the membrane (2) is arranged on one of the sides (31) and forms part of this side (31). In Figure 2, the membrane (2) covers the entire side (31 '), the side (31') consists of said membrane (2).
Uppflnningen kan även användas med andra typer av retroreflektor. Till exempel kan ett s.k. "kattöga" användas som retroreflektor. l ett kattöga används en lins i kombination med ett buktigt bakplan. likt ett öga, för att återspegla ljus som faller in mot linsytan. Med flera optiska element (linser ochleller speglar) kan retroreflexer erhàllas även med plana bakplan. l figur 6-7 visas anordningen (1) med retroreflektor i form av kattöga (4). l figur 6 innefattar den bakre buktiga ytan ett membran (2), alternativt kan den bakre buktiga ytan utgöras av ett membran.The invention can also be used with other types of retroreflector. For example, a so-called "cat's eye" is used as a retrore ector. A cat's eye uses a lens in combination with a curved back plane. like an eye, to reflect light falling towards the lens surface. With your optical elements (lenses and / or mirrors) retrorexes can also be obtained with flat back planes. Figures 6-7 show the device (1) with a retroreector in the form of a cat's eye (4). layer 6, the rear curved surface comprises a membrane (2), alternatively the rear curved surface may consist of a membrane.
Utrymmet innanför membranet (2) utgörs lämpligen av en gas för att membranet (2) skall kunna svänga fritt vid påverkan från ett tryckfält (5). l figur 7 är ett membran (2) anordnat som en vinklad reflektor framför kattögat (4).The space inside the diaphragm (2) is suitably made of a gas so that the diaphragm (2) can swing freely under the influence of a pressure field (5). Figure 7 is a diaphragm (2) arranged as an angled reflector in front of the cat's eye (4).
I figur 3 visas ett system (10) enligt uppfinningen. Systemet (10) för optisk fjärravlyssning innefattande en ljuskälla (11), en sensor (12), en enhet (13) för signalbehandling av en fràn sensor (12) mottagen signal (7), samt en anordning (1), mikrofon, enligt ovan. Anordningen (1 ) kan användas ensam eller för mer komplexa mätningar kan tvà eller flera mikrofoner anordnas tillsammans. I figuren är systemet exemplifierat med en retroreflektor i form av en hörnkub (3). Det går även att använda andra typer av hörnkuber, som t.ex. visas i figur 2, eller andra typer av retroreflektorer som t.ex. kattöga, enligt figur 6-7. 10 15 20 25 30 35 528 D04 3 När flera anordningar/mikrofoner samordnas i geometriska konfgurationer, placeras i anslutning till varandra, sà kan ljudets utbreclningsriktning analyseras. Figur 4 visar ett exempel pä hur flera anordningar (1) kan anordnas efter varandra längs en linje.Figure 3 shows a system (10) according to the invention. The system (10) for optical remote listening comprising a light source (11), a sensor (12), a unit (13) for signal processing of a signal (7) received from sensor (12), and a device (1), microphone, according to above. The device (1) can be used alone or for more complex measurements, two or two microphones can be arranged together. In the clock, the system is exemplified by a retrore ector in the form of a corner cube (3). It is also possible to use other types of corner cubes, such as shown in Figure 2, or other types of retroactors such as cat's eye, according to 6- gur 6-7. 10 15 20 25 30 35 528 D04 3 When several devices / microphones are coordinated in geometric configurations, placed next to each other, the direction of propagation of the sound can be analyzed. Figure 4 shows an example of how your devices (1) can be arranged one after the other along a line.
Flera anordningar (1) kan även samordnas för att öka det synfält i vilket de gemensamt áterreflekterar ljus. Figur 5 visar ett exempel där åtta hörnreflektorer (3) anordnats i en kub för att àterreflektera ljus i ett utökat synfält.Several devices (1) can also be coordinated to increase the field of view in which they jointly reflect light. Figure 5 shows an example where eight corner reflectors (3) are arranged in a cube to reflect light in an extended field of view.
Att använda flera anordningari ett system ger bl.a. möjlighet att bestämma riktning till ljudkällan och eventuell förflyttning av ljudkällan. Avläsningen kan ske genom att belysa alla anordningama med samma ljuskälla eller så kan flera ljuskällor användas. Signalema fràn de olika anordningama kan sedan särskiljas genom t ex optisk multiplexeringsteknik.Using several devices in one system gives e.g. possibility to determine the direction of the sound source and possible movement of the sound source. The reading can be done by illuminating all the devices with the same light source or several light sources can be used. The signals from the different devices can then be distinguished by, for example, optical multiplexing technique.
Anordningen innebär att ett ljusmodulerande akustiskt membran kombineras med en retroreflekterande anordning, retroreflektor, så att det ljus som återspeglas frän anordningen bär med sig en modulering motsvarande tryckfältet i anslutning till mikrofonmembranet. Membranet ger en god koppling mellan tryckfältet och ljuset.The device means that a light-modulating acoustic diaphragm is combined with a retrore-ecting device, retrore-ktector, so that the light reflected from the device carries with it a modulation corresponding to the pressure field adjacent to the microphone diaphragm. The membrane provides a good connection between the pressure field and the light.
Retroreflektion ingár för att rimligt mycket optisk effekt skall återspeglas mot en optisk sensor i anslutning till en belysande ljuskälla. Det finns ett antal olika utföringsformer av retroreflektorer och hur membranet kan anordnas.Retrore ection is included so that a reasonable amount of optical power is reflected against an optical sensor in connection with an illuminating light source. There are a number of different embodiments of retroreflectors and how the diaphragm can be arranged.
Ett relativt enkelt membran vibrerar med ljud-/tryckfältet i dess omgivning. lntensitets- och fasmodulering i det àterspeglande optiska fältet uppstår genom att den speglande ytans form och läge ändras. Formen svänger från konvex till konkav kring ett plant jämviktsläge vilket fokuserar och defokuserar ljuset. intensiteten på en detektor med begränsad apertur, vid ljuskälla, kan därmed komma att moduleras. Ändringen i spegelytans läge kan också mätas: lnterferometriskt, teknik som gör det möjligt att mäta ett optiskt fälts relativa fas. Spegelytans, dvs. det akustiska membranets, utslag kommer då att kunna mätas med högre upplösning varmed svagare ljus kan detekteras. En retroreflektor i form av en hörnkub återreflekterar ljus som infaller mot den inom ett begränsat synfält. Det återreflekterande ljuset speglas alltid i tre ytor. Ett sätt att åstadkomma en anordning/mikrofon är att ersätta en sida eller en del av en sida i hörnkuben med ett akustiskt membran med en speglande yta. 10 15 20 25 30 528 004 4 Anordningen har ett flertal fördelar. Den är billig att tillverka, tillförlitlig och robust, upptar liten plats i lager och vid användning och är enkel att använda. En stor fördel är att anordningen är passiv, dvs. svàrupptäckt, dessutom krävs ingen kraftförsörjning av anordningen.A relatively simple diaphragm vibrates with the sound / pressure field in its surroundings. Intensity and phase modulation in the reflecting optical field occurs by changing the shape and position of the reflecting surface. The shape swings from convex to concave around a flat equilibrium position which focuses and defocuses the light. the intensity of a detector with limited aperture, at light source, may thus be modulated. The change in the position of the mirror surface can also be measured: interferometric, technology that makes it possible to measure the relative phase of an optical field. The mirror surface, i.e. the rash of the acoustic membrane will then be able to be measured with a higher resolution with which weaker light can be detected. A retrore ector in the form of a corner cube re-reflects light incident on it within a limited field of view. The reflecting light is always reflected in three surfaces. One way to provide a device / microphone is to replace one side or part of a side of the corner cube with an acoustic diaphragm with a reflective surface. The device has a number of advantages. It is cheap to manufacture, reliable and robust, takes up little space in stock and during use and is easy to use. A big advantage is that the device is passive, ie. difficult to detect, in addition no power supply of the device is required.
Anordningen, mikrofonen, för optisk fjärravlyssning innefattande en retroreflektor (3,4) samt ett akustiskt membran (2). Det akustiska membranet (2) är lämpligen ljusmodulerande och modulerar reflektionen av en infallande ljusstråle (6) i förhållande till det tryckfält (5) som membranet (2) utsätts för. Retroreflektorn (3,4) kan innefattar en hömkub (3) innefattande tre sidor (31,32,33; 31 ',32',33') med membranet (2) är anordnat på en av sidorna. Membranet (2) kan vara en del av en sida (31) eller en sida (31 ') kan består av ett membran (2). l en annan utföringsform kan retroreflektorn (3,4) innefattar ett kattöga (4). Membranet (2) kan då anordnat längs kattögats bakre buktiga yta eller som en vinklande reflektor framför kattögat (4)- Systemet för fiärravlyssning (10) innefattande en ljuskälla (11), en sensor (12), en enhet (13) för signalbehandling av en fràn sensor (12) mottagen signal (14) samt en anordning (1) enligt ovan. System kan innefatta två eller fler anordningar (1) anordnade efter varandra längs en linje.The device, the microphone, for optical remote listening including a retrore (ector (3,4) and an acoustic diaphragm (2). The acoustic membrane (2) is suitably light modulating and modulates the reaction of an incident light beam (6) in relation to the pressure field (5) to which the membrane (2) is exposed. The retractor (3,4) may comprise a corner cube (3) comprising three sides (31,32,33; 31 ', 32', 33 ') with the membrane (2) arranged on one of the sides. The membrane (2) may be part of a side (31) or a side (31 ') may consist of a membrane (2). In another embodiment, the retroreflector (3,4) may comprise a cat eye (4). The diaphragm (2) can then be arranged along the posterior curved surface of the cat's eye or as an angled rectifier in front of the cat's eye (4). a signal (14) received from sensor (12) and a device (1) as above. Systems may comprise two or more devices (1) arranged one after the other along a line.
Här följer ett antal exempel på tillämpningar då uppfinningen är användbar.Here are a number of examples of applications where the invention is useful.
Talöverföring mellan personeri situationer där röjningsrisken måste vara làg eller där andra kommunikationssätt inte kan användas (t ex för polisen eller jägarförband). Vid räddningsoperationer där uppfinningen kan ingå som en komponent i livråddningsutrustning för lokalisering och kommunikation med den nödställde. Avlyssning genom fönster och vindrutor genom att mikrofonanordningen placeras i utrymmet i siktlinje för belysning. Lokalisering av fordonsljud, vapenavfyming mm via pejling, där fler mikrofonanordningar utplaceras och samverkar, en optisk sändar-/mottagarenhet används för att registrera signalerna från mikrofonenheterna. Uppfinningen kan även ersätta radiokommunikation i lokala marksensornätverk eller för uppmätning och övervakning av vibrationer för civila ändamål inom t ex bygg och verkstadsindustrin.Speech transmission between persons in situations where the risk of clearing must be low or where other means of communication cannot be used (eg for the police or hunting associations). In rescue operations where the invention can be included as a component in life-saving equipment for locating and communicating with the person in need. Listening through windows and windscreens by placing the microphone device in the space in line of sight for lighting. Location of vehicle noise, weapon firing, etc. via bearing, where your microphone devices are deployed and interact, an optical transmitter / receiver unit is used to register the signals from the microphone units. The invention can also replace radio communication in local ground sensor networks or for measuring and monitoring vibrations for civilian purposes in, for example, the construction and engineering industries.
Claims (10)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0403074A SE528004C2 (en) | 2004-12-17 | 2004-12-17 | Device for optical remote listening and systems including such device |
EP05813558.3A EP1836784B1 (en) | 2004-12-17 | 2005-12-08 | Device for optical remote monitoring and system comprising such a device |
US11/793,140 US8050569B2 (en) | 2004-12-17 | 2005-12-08 | Device for optical remote monitoring and system comprising such a device |
PCT/SE2005/001868 WO2006065203A1 (en) | 2004-12-17 | 2005-12-08 | Device for optical remote monitoring and system comprising such a device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0403074A SE528004C2 (en) | 2004-12-17 | 2004-12-17 | Device for optical remote listening and systems including such device |
Publications (3)
Publication Number | Publication Date |
---|---|
SE0403074D0 SE0403074D0 (en) | 2004-12-17 |
SE0403074L SE0403074L (en) | 2006-06-18 |
SE528004C2 true SE528004C2 (en) | 2006-08-01 |
Family
ID=33563229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE0403074A SE528004C2 (en) | 2004-12-17 | 2004-12-17 | Device for optical remote listening and systems including such device |
Country Status (4)
Country | Link |
---|---|
US (1) | US8050569B2 (en) |
EP (1) | EP1836784B1 (en) |
SE (1) | SE528004C2 (en) |
WO (1) | WO2006065203A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2161597B1 (en) * | 2008-09-03 | 2014-06-04 | Brainlab AG | Image-assisted operation system |
US8204384B2 (en) * | 2008-11-21 | 2012-06-19 | Cubic Corporation | Phase-modulating communication device |
US8594507B2 (en) * | 2011-06-16 | 2013-11-26 | Honeywell International Inc. | Method and apparatus for measuring gas concentrations |
US20120321322A1 (en) * | 2011-06-16 | 2012-12-20 | Honeywell International Inc. | Optical microphone |
US9678329B2 (en) * | 2011-12-22 | 2017-06-13 | Qualcomm Inc. | Angled facets for display devices |
Family Cites Families (28)
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US3863064A (en) * | 1972-01-03 | 1975-01-28 | Philco Ford Corp | Differential retrocommunicator |
FR2247032A1 (en) * | 1973-10-03 | 1975-05-02 | Reibaud Jean | Telephonic system with light modulating microphone - uses optic fibres between microphone and receiver |
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DE3601764A1 (en) * | 1986-01-22 | 1987-07-23 | Messerschmitt Boelkow Blohm | RETROMODULATOR |
FR2602346B1 (en) * | 1986-08-01 | 1988-09-16 | Thomson Csf | LOCATION SYSTEM USING A LASER BEAM RETROREFLECTOR AND MODULATOR ASSEMBLY |
JPH02190099A (en) | 1989-01-18 | 1990-07-26 | Nec Corp | Optical microphone |
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DE19623504C1 (en) * | 1996-06-13 | 1997-07-10 | Deutsche Forsch Luft Raumfahrt | Optical microphone using Fabry-Perot interferometer and fibre=optics feed line |
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US6137623A (en) * | 1998-03-17 | 2000-10-24 | Mcnc | Modulatable reflectors and methods for using same |
US6154551A (en) * | 1998-09-25 | 2000-11-28 | Frenkel; Anatoly | Microphone having linear optical transducers |
WO2002032150A2 (en) * | 2000-10-12 | 2002-04-18 | Orit Technological R & D Center Ltd. | Infra-red communication apparatus, system and method |
CA2324572A1 (en) * | 2000-10-26 | 2002-04-26 | Gerry M. Kane | Digital vibration transducer |
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DE10314731A1 (en) * | 2003-03-31 | 2004-10-28 | Sennheiser Electronic Gmbh & Co. Kg | Sensor or microphone with such a sensor |
GB0324418D0 (en) * | 2003-10-17 | 2003-11-19 | Bae Systems Plc | Rectroreflective devices and systems |
US7268930B1 (en) * | 2004-01-16 | 2007-09-11 | United States Of America As Represented By The Secretary Of The Navy | Optical modulator |
US7950812B2 (en) * | 2006-01-11 | 2011-05-31 | Cubic Corporation | Shutters for infra red communication at moderate bandwidths |
US7345804B1 (en) * | 2006-06-19 | 2008-03-18 | Hrl Laboratories, Llc | Dynamic optical tag communicator and system using corner cube modulating retroreflector |
US7719746B2 (en) * | 2007-09-13 | 2010-05-18 | The United States Of America As Represented By The Secretary Of The Navy | High performance chirped electrode design for large area optoelectronic devices |
-
2004
- 2004-12-17 SE SE0403074A patent/SE528004C2/en not_active IP Right Cessation
-
2005
- 2005-12-08 EP EP05813558.3A patent/EP1836784B1/en not_active Not-in-force
- 2005-12-08 WO PCT/SE2005/001868 patent/WO2006065203A1/en active Application Filing
- 2005-12-08 US US11/793,140 patent/US8050569B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1836784B1 (en) | 2014-02-19 |
US20080131115A1 (en) | 2008-06-05 |
WO2006065203A1 (en) | 2006-06-22 |
EP1836784A1 (en) | 2007-09-26 |
SE0403074D0 (en) | 2004-12-17 |
EP1836784A4 (en) | 2012-12-12 |
SE0403074L (en) | 2006-06-18 |
US8050569B2 (en) | 2011-11-01 |
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